Device for riveting wire pins to head-plates on both sides.



M. HANDKE.

DEVICE FOR RIVETING WIRE PIN S T0 HEAD PLATES ON BOTH SIDES.

APPLICATION FILED JUNE 12. 1914.

1,%2,3% Patented Apr. 9, 1918.

.dttorney.

UNITED STATES PATENT, onnron.

m HANDKE, OF BERLIN, GERMANY.

" nnvrcn non. mvnrme wran rms 'ro nnnn-rnerns on no'rn snms.

Application filed June 12, 1914. Serial I to. 844,827.

To all whom it may concern: I

Be it known that I Max HANnxn, a subject of the'German Elmperor, residing at 6 Flottwellstrasse, Berlin, Prussia, Germany, have invented a certain new and useful Device for Riveting Wire Pins to Head-Plates on Both Sides, of .which the followmg 1s a specification.

Hitherto it has been necessary in order rigidly to connect wire pins to perforated head plates, as, for example, 1n the manufacture of drawing p ns, carpet and upholstery pins and the hke to form a protuberance on the shank of the pm and then to clamp the head plate between this protuberance and the end of the pm by upsetting the latter. I o

The device which formsthe ob ect of the present invention renders it possible to dlspense with this protuberance, as 1t efi'ects riveting on both sides. Thls also renders 1t possible to form the pin from a continuous wire, an advantage which it has hitherto been impossible to secure when employing perforated head plates. I

The desired object is attained owing to the fact that the pin or wire 1s held between clamping jaws and the perforated head plates are conducted separately to the end of the pin in such a manner that on both sides of the head plate thus for the t1m e being passed onto the wire, a length of pm or wire remains free. Consequently when the upsettin operation is subsequently eifected, a rivet head is formed at each side of the plate. .7

Several forms of the device accordm to the invention are illustrated, by way 0 egample, in the accompanying dlagrammatlc drawings.

. Figure 1 is a sectional elevatlon of one arrangement of the device according to the invention.

Figs. 2 and 3 illustrate different stages 1n the fitting of the head plate to the fpin.

Fig. 4 1s a sectional elevation o a mod1- fied arrangement.

Fig. 5 illustrates the aCtIOILOf the parts of the arrangement illustrated in Fight Fi 6 is a sectional elevation of a rther modi cation. v

Fig. 7 shows the pin as fimshed by the arrangement shown in Fig. 6.

Figs. 8 and 9 show a further modificatlon by which the head plates may be given a determined form.

Referring to Fig. 1 the wirea intended for formin the pins is held between two clamping aws b and is fed intermittently in an appropriate manner. The head plates 0 are supplied through a guide channel d the separation of the individual head plates being efi'ected in a lmown manner, or example, by means of two fingers 6 displaced in opposite directions. The head plate that has been released falls through a 'slot f into a sleeve 9 in which it advantageously under the action of. friction or is exposed to a certain resilient pressure in its forward displacement by the plunger 72.. The wire a protrudes from the clamping jaws to such an extent that it enters the sleeve 9 slightly, thereby insuring the head plate being passed onto the wire, as the head plate onl been gui ed onto the wire a. As shown in Flg. 2, a short length of wire remains free on both sides of the plate 0 passed thereon, so that in the subsequent upsetting by the plunger 71. a rivet head is formed on both sides. The wire a with the head plate a riveted thereon, is then fed for a given length (see Fig. 3) and finally the wire is severed.

It is advantageous to provide a small swage i behind the head in the clamps b for forming the rivet. V

In the arrangement accordin tothe invention hereinbefore describe the head plates 0 are supplied automatically. It is however, obvious that they might be inserted in the sleeve 9 by hand.

In order to insure the head plates being Specification of Letters l'atent. Patented Apr, 9, 1918,

eaves the sleeve 9 after it has passed onto the pin or end of the wire with certainty, the plunger 72. may be magnetized so that the head plates adhere firmly to it until they have been riveted. The sleeve '9 surrounding the plunger should preferably be of non-magnetic material such as brass.

The arrangement according to the invention illustrated in Fi s. 4 and 5 difiers from maintenance of an upright position. I In this construction the sleeve 9 is displaceable and through the intermediary of the stops It 1participates to a certain extent in the disp ace- 1 ment of the plunger huntil it is stopped b the clamping jaws b. The spring stops are then pressed back by the plunger h or the head plate '0 located in fi'ont of it (see Fig. 5) so that they do not present any obstacle to the rivetin operation. The sleeve I jaws b.

It will be obvious that in the arrangement according to the invention illustrated in lFi 4 audit the plunger 72. might be fixed an the clamping aws b be displaced with the wire a toward it the resilient sleeve 9 being pressed back by the clamping jaws.

' head, he cavity at in the riveting p all In the upsetting operation, in order to prevent the yieldin of the end of the wire rotruding from t e head plate a and to em it into a rounded rivet head a, the plunger, in addition to the cavity m, cornprises a special recess 0 at the center in which the end of the wire engages and is formed into a rounded rivet head.

If it he desired to form a larger rivetv unger h is made of corresponding depth as shown in Fig. 6.-. The result of this arrangement is that the in or wire a extends to a corresponding y larger extent through the head plate 0, thus providing suficient material for the formation of a larger head a (see Fig. 7). Owin to the provision of the deep cavity at e plate c is given a somewhat pronounced arched tormationybut it this should not be desired, it can be reduced or altogether eliminated by retractive pressure.

In the manufacture of carpet pins, upholstery pins and so forth, in order to give an ap ropriate form to the head plate or to em oss it simultaneously with the riveting o eration or immediately thereafter, as s own in Figs. 8 and 9 the upsettin members b and h are suitably sha ed or this purpose. By this means the end plates, which have so far been fiat are given a definite arched or the like form or embossed with a definite pattern. In this case it is advantageous to fashion the head plate atter the pin as been riveted. With this object a special riveting pin Z may be resiliently mounted in the plunger h. This pin protrudes somewhat from the Inn er so that it efiects the riveting before t e p unger it becomes operative. After the riveting has been edected, thispin l is pressed back by the increasing ressure on the plunger h and the plate 0 is fashioned.

' ranged between t e matrix formed b greases in the matrix formed by the clamp, and

a older for the ,erforate'd head plates arclamp and the plungers working hea 2. Apparatus for riveting a wire pin to a perforated head plate on both sides of the plate, comprising a clamp for holding the wire and forming a matrix, a plunger in line therewith and a holder for the perforated head plates mounted on the plunger.

3. pparatus for rivetin a wire pin to a perforated head plate on oth sides of the plate, comprising a clamp for holding the wire and forming a matrix, a plunger in line therewith, and a holder for the perforated head plates in the form of a sleeve and movably arranged on the plunger.

4.. Apparatus for rivetin a .wire pin to a perforated head plate on oth sides of the plate, comprising a wire-clamp forming a matrix, a plunger in line therewith, and a sleeve movably arranged on the lunger projecting beyond the same, the sldeve having in its forepart a cross-slot for the entrance.

of the head plate.

5. A paratus for head p ate on both sides 0 the plate, comprising a wire-clamp formin I a matrix, a plunger in line therewith, an a holder for the head plates in the form of a sleeve and surrounding the plunger, the plunger being magnetized, while the sleeve is of non-magnetic material, substantially as and for the purpose described.

6. A paratus for rivetin a wire pin to a head p ate on both sides 0 the plate, comprising a wire-clamp formin a matrix, a plunger in line therewith, an a holder for the head plates, in the form of a sleeve and surrounding the plunger, the said sleeve having resilient stops for retaining in upright position a head plate introduced therein.

7. A paratus for rivetin a wire pin to a head p ate on both sides 0 the plate, comprising a wire-clamp forming a matrix, a plunger in line therewith, and a holder for the head plates, in the formof a sleeve and surroundmgthe plunger, the plunger having a recessed front face substantially as and for the purpose described.

8. A paratus for rivetin a wire pin to a head p ate on both sides 0 the plate, comand surroundingthe plunger, the plunger having a recess in its front face for rerivetin a wire pin to a ceiving the end portion or the pin after its the pin has assed through and beyond a of the lunger and pro'trudin from the lathead plate ue to relative movement heter su stantially as and fort e purpose detweenthe plunger and the wire-clamp, subscribed. stantially as and for the purpose described. In testimony whereof I have hereunto 5 5 9. Apparatus for riveting a wire pin to a signedmy name to this specification in the head plate on bolth sidis 0f the plate, compresence of two subscribmg witnesses. pnsmg a wire-c amp ormmga matrlx, a I plunger in line therewith, and a holder for M HANDKE' the head plates, in the form of asleeve and Witnesses: 1o surrounding the plunger, and a riveting pin Max 'Gommscn,

resiliently arranged in a hole in the center z 

